Not to be rude, but you cough/sneeze into your stuff. I find that to pretty disgusting.
Turn off your PC and start with Lysol wipes, suffice all of that spit, phlegm and snot that you've shot all over your machine.
Then get a clean wash cloth, rinse it with straight hot water, ring it out as dry as you can, go over it at least a few times making sure to get into crevices and corners.
You can also use a vacuum with the soft bristle brush attachment to try to break free food that is lodged around keys and such, and draw these particles up and out
Stop spraying body fluids all over your stuff. Wow is that horribly gross. Don't eat near your stuff. Eat at the table like a human. Food and drinks on and in your PC are not good.
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